package model;

import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * @Title: DBUtil
 * @Author 郑雨杭
 * @Package model
 * @Date 2024/7/29 15:25
 * @description:
 */
public class DBUtil {
    private static volatile DataSource dataSource = null;

    private static DataSource getDataSource() {
        if(dataSource==null){
            synchronized (DBUtil.class) {
                if (dataSource == null) {
                    dataSource = new MysqlDataSource();
                    ((MysqlDataSource) dataSource).setURL("jdbc:mysql://127.0.0.1:3306/blog_system?useSSL=false&characterEncoding=utf8");
                    ((MysqlDataSource) dataSource).setUser("root");
                    ((MysqlDataSource) dataSource).setPassword("123456");
                }
            }
        }
        return dataSource;
    }

    public static Connection getConnection() throws SQLException {
        return getDataSource().getConnection();
    }

    public static void close(Connection connection, PreparedStatement statement, ResultSet set) {
        if(set!=null){
            try {
                set.close();
            } catch (SQLException e) {
                throw new RuntimeException(e);
            }
        }
        if(statement!=null){
            try {
                statement.close();
            } catch (SQLException e) {
                throw new RuntimeException(e);
            }
        }
        if(connection!=null){
            try {
                connection.close();
            } catch (SQLException e) {
                throw new RuntimeException(e);
            }
        }
    }
}
